21760677 has 16 divisors (see below), whose sum is σ = 32316480. Its totient is φ = 14471856.

The previous prime is 21760639. The next prime is 21760679. The reversal of 21760677 is 77606712.

It is not a de Polignac number, because 21760677 - 2⁷ = 21760549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21760679) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15163 + ... + 16535.

It is an arithmetic number, because the mean of its divisors is an integer number (2019780).

Almost surely, 2^21760677 is an apocalyptic number.

21760677 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

21760677 is a deficient number, since it is larger than the sum of its proper divisors (10555803).

21760677 is a wasteful number, since it uses less digits than its factorization.

21760677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1969 (or 1963 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 36.

The square root of 21760677 is about 4664.8340806507. The cubic root of 21760677 is about 279.1841771547.

The spelling of 21760677 in words is "twenty-one million, seven hundred sixty thousand, six hundred seventy-seven".